Seat post heat sinks

What clearance should I give a seat post heat sink?
27.2, steel and stainless frames

Anders Waiker
NZ

Hi Anders

I would highly recommend for your hetasinks to be expandable in diameter (let's say from 26.8 to 27.4mm) or heat distortion might make your heatsink a heavy addition to the frame.
Being Stainless a material of your choice, should also get argon plugs and air channels for proper back purge

Cheers